Valve-seat-removing mechanism



Dec. 2, 1 24. 1,517,883

J. B. ALLEMAN VALVE SEAT REMOVING MECHANISM .File'd Sept. 25, 1921 v :4 T'IURNEV and conveniently.

Patented Dec. 2, 1924.

U 1 TE JACOB B. ALLEMAN, 0B BEAUMONT, TEXAfi.

vaLvn-smr-amome n i Application filed September 23, 1921. Sex-lad No. 502,751.

To all whom it may concern:

Be it known that I, JAooB B. ALLEMAN, a citizen ofthe United States of America, and a resident of Beaumont, county of J efferson. and State of Texas, have invented certain new and useful Improvements in Valve-Seat-Removing Mechanism, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

This invention relates to valve removing mechanism and more particularly to such mechanism for use in pumps and in pumping heavy oils and the like, or in any machine or engine having valves and employing heavy, sticky oils.

Hitherto in the operation of such pumps or engines, it has been found necessary to remove the valve operating parts for regrinding and other re airs at suitable intervals, and considerab e difiiculty has been experienced upon such removal because of the tendency of the parts to stick.

Broadly stated, it is the object of the present invention to provide improved means for removing such valve parts readily, quickly In accordance with this object, an improved form of removing tool is provided which is capable of being readily inserted into the engine for cooperating with the valve parts, by means of which cons derable force can be applied to such parts for the removal thereof.

Referring to the drawing:

Figure 1 shows a partially sectional elevation of the improved form of mechanism in osition for insertion into a valve.

igure 2 shows a partially sectional elevation of the mechanism in position for extracting a valve seat.

Figure 3 shows a section on the line 33 of Figure 2, and Figure 4 shows a section on the line 44 of Figure 1.

Like reference characters denote like parts in the several figures of the drawing.

Referring to the drawing, a preferred embodiment of the invention comprises a rod 10 having its upper end screw-threaded for the reception of a nut 11 and having a middle portlon of suitable diameter for insertion into the orifice of a valve seat 12.

The lower portion of the rod 10 is bifurcated, and in the transverse recess thus formed there is pivotally mounted a pair of shoes 13. The pivotal mounting 17 of each of the shoes is spaced apart from the center l ne of the rod 10. The form and construction of the shoes is such that their centers of mass are outward of the pivotal mounting. Extending across the recess and secured in the prongs of the lower portion of the rod 10 is a cylindrical in 14 made of hardened steel or the like. The lower portion of each of the shoes 13 is provided with a. rounded surface 15 curved to fit the curvature of the pin 14. The arrangement is such that when the shoes 13 are extended in the position as shown in Figure 2, these rounded surfaces 15 engage the pin 14.

In operation, the pins being held in the position shown in Figure 1, the lower end of the device may be inserted through the orifice\16 of the valve seat 12. When the upper surfaces of the shoes 13 pass below the lower face of the valve seat 12, the shoes 13 are extended into the position shown in Figure 2, by force of gravity, the center of mass of each of the shoes being disposed outwardly of the pivotal support. A suitable bar or other supporting means 18 is provided with a hole or slot through which the upper end of the rod 10 may be inserted. The nut 11 is screwed upon the free end portion of the rod 10, the bar 18 acting as a lever or supporting means against which force may be applied. By turning the nut 11 against a face of the bar 18, the valve seat 12 is gradually forced upwardly until entirely displaced from the remaining portion of the valve.

Itv will be seen of the device the strain is taken mainly by the pin 14 and thus the pivotal mountings of the shoes 13 are relieved from this strain. It is thus possible to remove valve seats that are tightly stuck in place, without injury to the pivotal mountings of the valve removing mechanism.

When the valve seat 12 has been removed from the machine in the manner described, the nut 11 is removed and the rod 10 may then be readily forced apart from the valve seat 12 by passing the screw-threaded end of the rod 10 through the valve seat. The valve seat may now be ground or otherwise that during the operation repaired and replaced in the pump or engine ventive thought upon which this application is based is broader than this illustrative embodiment. It is therefore understood that the scope of the invention is not to be limited. hy the present disclosure, reference beinghad to the appended claim for that purpose.

What It claim is:

Apparatus for removing valve seats comrising a member in the form of a rod havmg its lower end bifurcated to form a pair of prongs, a pair of oppositely disposed shoes mounted between said prongs and having recesses in their lower portions, pivot pins upon which the shoes are mounted, and a pin mounted between said prongs adapted to engage the recesses of said shoes when the latter are in operative position to limit their outwarol movement and to relieve the pivot pins supporting the shoes from strain durmg the forcible removal of the valve-seat.

In Witness whereof, I have hereunto set my hand this 14th day of Sept, 1921.

I J. B. ALLEMAN. 

